Ingredients

• ½ cup olive oil
• ¼ cup Champagne vinegar or white wine vinegar
• 1 teaspoon ground coriander
• 1 teaspoon kosher salt
• ¼ teaspoon freshly ground black pepper
• ⅛ teaspoon ground cardamom
• ½ large cantaloupe, rind and seeds removed, flesh cut into 1-inch pieces
• 1 large English hothouse cucumber, sliced on a diagonal ½ inch thick
• 2 Fresno chiles, thinly sliced
• ½ cup unsalted, roasted pumpkin seeds (pepitas)
• ¼ cup chopped cilantro
• ¼ cup chopped mint
• Sumac (for serving)
• Sumac, a tart, citrusy spice generally sold in ground form, can be found at Middle Eastern markets, specialty foods stores, and online.